Pivoting Flap Intake Device for Combustion Efficiency
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Solution Overview
Problem
Existing intake devices for internal combustion engines face challenges in achieving a compromise between generating 'tumble' type aerodynamics and maintaining permeability, which affects combustion efficiency and engine performance across varying load and speed conditions.
Innovation Solution
A pivoting flap system is introduced in the intake channel, comprising a main plate and a secondary plate that can pivot between open and partially closed positions, allowing for adjustable flow sections to modify aerodynamics and permeability according to engine operating parameters.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If a plate is placed in the inlet channel to generate tumble aerodynamics, then combustion efficiency is improved, but permeability deteriorates
Solution Approach 1:
The patent employs a pivoting flap instead of a fixed plate, allowing the inlet channel geometry to dynamically change based on operating conditions. The flap can rotate between positions to adjust the degree of obstruction, enabling the system to adapt between generating strong tumble aerodynamics and maintaining high permeability as needed.
Solution Approach 2:
The invention changes the geometric parameters of the inlet channel by rotating the flap to different angles. This allows continuous adjustment of the flow section area and turbulence generation, optimizing the balance between aerodynamics and permeability for different engine operating conditions.
2Quantity of substance
If the inlet channel is fully open to maximize permeability, then fuel supply is improved, but tumble aerodynamics are reduced
Solution Approach 1:
The pivoting flap enables dynamic adjustment of the inlet channel opening degree. Depending on engine load and speed requirements, the flap can be positioned to provide full opening for maximum permeability or partially closed to generate adequate tumble aerodynamics, optimizing performance for each operating regime.
Solution Approach 2:
By changing the angular position of the flap, the system varies the effective flow area and flow velocity distribution. This parameter change allows the inlet channel to transition between high permeability mode and high aerodynamics mode, matching different combustion requirements.
3Adaptability or versatility
If a pivoting flap is used to adjust flow sections, then adaptability is improved, but device complexity increases
Solution Approach 1:
The inlet channel control is segmented into discrete adjustable sections using the pivoting flap mechanism. The flap divides the channel into different flow sections that can be independently controlled by rotating the flap to various angles, providing adaptability while keeping the overall structure relatively simple compared to multiple movable components.
Solution Approach 2:
The single pivoting flap serves multiple functions: it controls the degree of channel obstruction, adjusts flow section division, generates tumble aerodynamics, and adapts to different operating conditions. This multi-functionality reduces the need for separate mechanisms for each function, thereby limiting the increase in device complexity.
Data Source
Figure 1~2
Figure 3~4
AI summary
The engine has a shutter (10) whose end plate is pivotally mounted on a plate based on an axis (14) parallel with a transversal axis (12) of a main plate (11). The shutter is displaced between an opening position in which the main plate and a secondary plate extend in extension with respect to each other and parallel to a direction of a supply channel (3) and divide into two flow sections. A principal plate blocks one of the flow sections, and the secondary plate is provided in a support against a wall of the channel when shutter is displaced in a partial closing position of channel. An independent claim is also included for a method for operating an internal combustion engine.